TASK 72-60-21-300-055 Repair The Drain Ports Of Main Gearbox Casing With Aluminum Bush, Repair-055 (VRS5706)

DMC:V2500-A0-72-60-2101-36A-664A-C|Issue No:003.00|Issue Date:2019-11-01

Export Control

EAR Export Classification: Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3), except for the following Service Bulletins which are currently published as EAR Export Classification 9E991: SBE70-0992, SBE72-0483, SBE72-0580, SBE72-0588, SBE72-0640, SBE73-0209, SBE80-0024 and SBE80-0025.

Copyright

© IAE International Aero Engines AG (2001, 2014 - 2021) The information contained in this document is the property of © IAE International Aero Engines AG and may not be copied or used for any purpose other than that for which it is supplied without the express written authority of © IAE International Aero Engines AG. (This does not preclude use by engine and aircraft operators for normal instructional, maintenance or overhaul purposes.).

Applicability

All

Common Information

TASK 72-60-21-300-055 Repair The Drain Ports Of Main Gearbox Casing With Aluminum Bush, Repair-055 (VRS5706)

Effectivity

FIG/ITEM

PART NO.

02-050

4B0402

02-050

4B0423

Material of component

PART IDENT

SYMBOL

MATERIAL

Main Gearbox Casing

A357/T61 (AMS4219)

Aluminum alloy

Bushing

AA2024-T3

(AMS4152/AMS4165/AMS4120)

Aluminum alloy

General

Price and availability - none

The practices and processes referred to in the procedure by the TASK numbers are in SPM.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 04-009 ANAEROBIC COMPOUND05972CoMat 04-009
CoMat 04-010 ACTIVATOR/PRIMERLOCALCoMat 04-010
DELETEDX111XDELETED
DELETEDX111XDELETED

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-60-21-350-160 If Present, Remove the Damaged Bush(es) from the Main Gearbox Drain Port(s)

    1. Refer to Figure.

      2. If present, remove the bush(es) from the Gearbox drain port(s).

      1. Remove the damaged bush from the gearbox port(s).

    2. SUBTASK 72-60-21-320-142 If the Repair is Performed for the First Time, Machine the Main Gearbox Drain Port(s)

    1. Refer to Figure, Figure and Figure, Table 901.

      2. Machine the diameter of the drain port(s).

      1. Diameter of the drain port(s) to be 0.911 in. - 0.915 in. (23.15 mm - 23.25 mm) and for depth, see Figure, Table 901.

      2. New machining must be concentric within 0.0050 in. (0.127 mm) of the sealing diameter of the original drain port.

      3. Use a boring machine.

      3. Tap the hole(s).

      1. The thread must be 1.000 - 12 UNJF.

      2. Use tapping tool.

    3. SUBTASK 72-60-21-220-171 Examine the Machined Drain Port(s)

    1. Refer to Figure and Figure.

      2. Clean the part.

      1. Refer to SPM TASK 70-11-03-300-503.

      3. Inspect the casing for cracks in the area of the machined drain port(s).

      1. Refer to SPM TASK 70-23-01-230-501.

      2. Cracks are not allowed.

      4. Do a visual inspection of the thread of the machined drain port(s).

      1. Damage less than one half of one full thread.

      2. Accept.

      5. Do a dimensional inspection of the thread of the machined drain port(s).

      1. Ensure the minimum wall thickness of the damaged location(s) is at least 0.051 in. (1.30 mm). If less, the repair cannot be done.

    4. SUBTASK 72-60-21-320-143 Produce Bush(es)

    1. Refer to Figure.

      2. Produce bush(es).

      1. Use only aluminium alloy AA2024-T3 per spec AMS4152 or AMS4165 or AMS4120. Do not use other materials.

      2. See Figure, Table 901 for bush depth. Bush(es) should contain 1.000 - 12 UNJF cut threads.

      3. Use a grinding machine or a lathe.

    5. SUBTASK 72-60-21-380-001 Apply the Chromate Conversion Coating on the Machined Drain Port(s) and the Bush(es)

      1. Apply the chromate conversion coating to the machined drain port(s) and bush(es).

      1. Refer to SPM TASK 70-38-02-300-503.

    6. SUBTASK 72-60-21-380-002 Prepare the Machined Areas and Install the Bush(es)

    1. Refer to Figure and Figure.

      2. Apply Loctite activator to threads of machined drain port(s) and bush(es).

      3. Apply Loctite 640 to the thread of the bush.

      4. Install the bush(es) into the drain ports(s).

      1. Screw the bush(es) full bottom into the machined drain port(s).

      2. Torque must not exceed 220 lbfin. (25 Nm).

      3. Use torque tool.

      5. Cure the compound.

      1. Let the compound cure at room temperature at least for 24 hours.

    7. SUBTASK 72-60-21-320-144 Machine the Bush(es)

    1. Refer to Figure and Figure.

      2. Machine the top land of the bush(es) with the casing contour.

      1. Use milling machine to flush the bush(es) top land with casing contour.

      2. Surface finish is 100 microinches (2.5 micrometer).

      3. Machine the inner diameter of the bush(es).

      1. Machine the inner diameter of the bush(es) to be 0.685 in. - 0.689 in. (17.40 mm - 17.50 mm) and depth until bottom of original drain hole(s).

      2. Use a boring machine.

      4. Tap the drain hole(s).

      1. The thread must be 0.750 - 16 UNJF 13 mm full thread minimum.

      2. Use tapping tool.

      5. Machine the chamfer of the bush(es).

      1. Use a grinding machine.

    8. SUBTASK 72-60-21-110-058 Clean the Machined Area and the Drain Port(s)

      1. Clean the machined area and the drain port(s).

      1. Refer to SPM TASK 70-11-03-300-503.

      2. Make sure the drain passage(s) are open and clean.

    9. SUBTASK 72-60-21-380-003 Apply the Chromate Conversion Coating

      1. Apply the chromate conversion coating to the machined areas.

      1. Refer to SPM TASK 70-38-02-300-503.

    10. SUBTASK 72-60-21-350-144 Identify the Repair

      1. Make a mark VRS5706 (if not already marked) adjacent to the part number.

      1. Refer to SPM TASK 70-09-00-400-501, SUBTASK 70-09-00-400-001.

      2. Used method 3 (vibration peen).

      2. Apply the chromate conversion coating to areas affected by marking.

      1. Refer to SPM TASK 70-38-02-300-503.

    11. Figure: Main Gearbox Casing - Repair Location(s)

    Main Gearbox Casing - Repair Location(s)

    Main Gearbox Casing - Repair Location(s)

    Main Gearbox Casing - Repair Location(s)

    Main Gearbox Casing - Repair Location(s)

    Main Gearbox Casing - Repair Location(s)

    Main Gearbox Casing - Repair Location(s)

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised figures. (19VF826)

Change Type:

Update surface finsh values in Fig 1 Sht 6 (CAS-46685-J0Z7J0) (16VF828)

Manufacturer Code:05972
Enterprise Name:HENKEL CORP.
BU Name:HENKEL CORP.
Street:1001 TROUT BROOK CROSSING
City:ROCKY HILL
State:CT
Zip Code:06067-3910
Country:USA
Phone Number:1-800-243-4874, 1-860-571-5100
Fax Number:1-800-344-4503, 1-860-571-5465
Internet:www.aerospace.henkel.com
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:X111X
Enterprise Name:N/A – DELETED CONSUMABLE MATERIAL
Manufacturer Code:05972
Supply Number:CoMat 04-009
Type:sp01
Supply Short Name:CoMat 04-009 ANAEROBIC COMPOUND
Supply Name:CoMat 04-009 ANAEROBIC COMPOUND
Specification Groups:
Doc NumberType
PWA 549-2LOCTITE 640 (GREEN)/RETAINING
Suppliers:
ManufacturerRemarks
05972
Manufacturer Code:LOCAL
Supply Number:CoMat 04-010
Type:sp01
Supply Short Name:CoMat 04-010 ACTIVATOR/PRIMER
Supply Name:CoMat 04-010 ACTIVATOR/PRIMER
Specification Groups:
Doc NumberType
OMAT:8/80LOCQUIC PRIMER T 7471 MIL-S-22473 GRADE T
PMC 1288LOCQUIC PRIMER T 7471 MIL-S-22473 GRADE T
Suppliers:
ManufacturerRemarks
LOCAL
05972
81349
Manufacturer Code:LOCAL
Supply Number:DELETED
Type:sp01
Supply Short Name:DELETED
Supply Name:DELETED
Specification Groups:
Doc NumberType
DELETED
Suppliers:
ManufacturerRemarks
LOCAL